Prefabricated Double-Film Single-Slope Solar Greenhouse

Ruize produces the Prefabricated Double-Film Single-Slope Solar Greenhouse in China and supplies it for overseas protected-cultivation projects. The structure is developed for farms and planting bases that need better nighttime temperature retention, simpler installation and relatively low daily maintenance.

Its main difference from a conventional single-film greenhouse is the use of two independent frame layers and two layers of greenhouse film. The enclosed air space between the films acts as an insulating layer, helping reduce heat loss during cold nights and making the internal temperature less prone to rapid changes.

Double-film Insulation Structure

The inner and outer films are separately supported by the greenhouse frame, creating a closed air layer between them. According to the supplied product description, this configuration can improve nighttime insulation performance by more than 40% compared with a conventional single-film structure.

• Two independent film-supporting layers
• Enclosed air space for additional insulation
• Reduced nighttime heat loss in frost-prone conditions
• Inner and outer films can be replaced separately

The double-film arrangement is intended to help reduce rapid nighttime temperature drops and lower the risk of frost damage to crops in suitable climates. Its actual thermal effect is affected by outside temperature, greenhouse sealing and the selected supporting equipment.

Single-slope Solar Heat Collection

The greenhouse retains the heat-collection principle of a single-slope solar greenhouse. The front slope uses a planned light-receiving angle to make better use of available winter sunlight, while the rear section provides additional heat retention after sunset.

The rear thermal layer helps store and retain heat within the greenhouse environment, reducing the speed of nighttime cooling. For colder conditions, the structure can be combined with insulation blankets and low-temperature heating equipment according to crop requirements.

EVA Film for Low-temperature Use

The original configuration specifies EVA low-temperature greenhouse film as a suitable covering option. The film can be selected with anti-fog and anti-drip characteristics to help reduce condensation and water droplets inside the greenhouse.

The outer and inner coverings serve different positions within the double-film system, and either layer can be replaced independently when needed. This simplifies later maintenance compared with replacing the complete covering system at one time.

Bolted Assembly Without On-site Welding

All major structural components are prefabricated to standardized dimensions before shipment. On site, the greenhouse is assembled using bolts and connecting fittings rather than field welding, reducing the need for welding equipment and specialized welding labor.

• Factory-prefabricated structural components
• Bolted and connection-based assembly
• No main-frame welding required on site
• Modular sections suitable for overseas shipment

The lightweight modular construction also makes the greenhouse easier to separate into transportable sections. This is particularly suitable for export projects using containerized transportation.

Simple Structure for Routine Maintenance

The lightweight frame, standardized components and separate inner and outer films make the greenhouse relatively straightforward to maintain. Common inspection points include the film condition, frame connections, ventilation components and supporting thermal systems.

Because the two film layers are installed independently, damage to one layer does not require replacement of the other layer at the same time. Original frame fittings and double-film components can also be supplied for later maintenance.

Configuration Reference

Supporting Systems for Crop Management

The greenhouse can be fitted with the supporting systems listed in the original configuration according to local conditions and planting requirements.

• Electric thermal blanket rolling system
• Side ventilation film system
• Air circulation fans
• Micro water and fertilizer integration equipment
• Low-temperature heating equipment
• Temperature and humidity monitoring
• Anti-fog and anti-drip accessory package

These systems can be selected individually rather than requiring every project to use the same configuration.

Suitable Applications

The greenhouse is intended for protected cultivation in areas where frost, significant day-night temperature differences and nighttime heat loss are concerns.

• Frost-prone growing regions
• Strawberry picking farms
• Off-season vegetable cultivation
• Flower overwintering projects
• Small and medium-sized family farms
• Energy-saving agricultural demonstration bases

It is particularly suited to projects that need a relatively simple greenhouse structure while placing greater emphasis on winter heat retention and straightforward installation.

Suitable for Overseas Modular Delivery

The prefabricated design allows the structural components to be divided into modules before shipment. This makes the system suitable for container transportation and simplifies unloading and assembly after arrival.

Ruize can provide assembly drawings, step-by-step installation videos and related technical materials for overseas projects. The factory also supports continued supply of the original double-film materials and structural fittings used for later replacement.

Frequently Asked Questions

Does the double-film structure improve nighttime insulation?

Yes. The two films create an enclosed air layer between them, which helps reduce nighttime heat loss. The supplied product description states that insulation performance can improve by more than 40% compared with a single-film greenhouse.

Will the double-film structure make ventilation more difficult?

The double-film structure itself is designed to provide additional insulation, while ventilation can be managed through the side ventilation film system and air circulation fans listed in the configuration. The actual ventilation arrangement depends on the greenhouse installation and operating conditions.

Can the outer film and inner film be replaced separately?

Yes. The two film layers are independently installed, so the damaged layer can be replaced separately without changing the complete greenhouse frame.

Is the greenhouse suitable for first-time growers?

The modular structure, relatively simple supporting systems and separate film layers make it suitable for growers who prefer straightforward installation and routine maintenance. The final configuration should still match the local climate and crop requirements.

Can the greenhouse be used in colder areas?

Yes. The double-film insulation structure and single-slope heat-retention design are intended for frost-prone conditions. Where temperatures are lower, thermal blankets and low-temperature heating equipment can be added according to the crop and local winter conditions.